Update: I was unfortunately not aware of Shamus Young's severe criticism of Fallout 3 available here to link in the original piece and I regret that. It dovetails rather nicely with what I've written and it's much better executed than my piece. I strongly recommend anyone...

Xbox

Farm Road Shortcut:
On Farm Road 109, if you are in the Jeep Liberty Sport; you don't have to memorize
the pattern of the train to take the shortcut across the train tracks. With
the Jeep Liberty Sport you can almost always take the shortcut even if the train
is coming. You just go to the right side of the tracks and you will almost always
make it across.